An Error(AVFoundationErrorDomain)raised, when tried to do offline playback

Hello there,

We are implementing offline playback now, but when we try to get persistentContentKey, we got the following error.

- Error

Error Domain=AVFoundationErrorDomain Code=-11800 "The operation could not

be completed" UserInfo={NSLocalizedFailureReason=An unknown error occurred

(-16227), NSLocalizedDescription=The operation could not be completed,

NSUnderlyingError=0x2837462e0 {Error Domain=NSOSStatusErrorDomain

Code=-16227 "(null)"}}

Does it mean the domain could not being solved? And because of that the error was raised?

Anyone has any idea?

Thanks in advance,

YIng